Photoelectrochemical Properties of CuCrO2: Characterization of Light Absorption and Photocatalytic H2 Production Performance

Yi, Yuanping; Zhou, Xin; Ma, Qianyun; Litke, A Anton; Liu, Peng; Zhang, Y Yi; Li, C; Hensen, Emiel Emiel

doi:10.1007/s10562-014-1318-1

Cited by 34 publications

(25 citation statements)

References 49 publications

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“…Similar results were also reported by Sánchez‐Alarcón et al Elsewhere, CuCrO 2 nanoparticles were also prepared by hydrothermal synthesis . In terms of applications, CuCrO 2 thin films have until now been integrated into amorphous thin‐film transistors for electronics, ozone sensors, photocatalytic H 2 production devices, and biological devices that serve as antibacterial agents against Escherichia coli …”

Section: Introductionsupporting

confidence: 77%

ZnO/CuCrO₂ Core–Shell Nanowire Heterostructures for Self‐Powered UV Photodetectors with Fast Response

Cossuet

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Rapenne

et al. 2018

Adv Funct Materials

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An original self-powered UV photodetector integrating ZnO/CuCrO 2 core-shell nanowire heterostructures is fabricated using low-cost and scalable chemical deposition techniques operating at moderate temperatures. A 35 nm thick delafossite phase CuCrO 2 shell is formed with high uniformity by aerosol-assisted chemical vapor deposition over an array of vertically aligned ZnO nanowires grown by chemical bath deposition. The CuCrO 2 shell consists of columnar grains at the top of ZnO nanowires as well as nanograins with some preferential orientations on their vertical sidewalls. The ZnO/CuCrO 2 core-shell nanowire heterostructures exhibit significant diode behavior, with a rectification ratio approaching 1.2 × 10 4 at 1 V and -1 V, as well as a high optical absorptance above 85% in the UV part of the electromagnetic spectrum. A high UV responsivity at zero bias under low-power illumination of up to 3.43 mA W -1 under a 365 nm UV lamp, and up to 5.87 mA W -1 at 395 nm from spectrally resolved measurements, alongside a high selectivity with a UV-to-visible (395-550 nm) rejection ratio of 106 is measured. The short rise and decay times of 32 and 35 µs, respectively, both measured at zero bias, further establish these devices as promising candidates for cost-efficient, all-oxide self-powered UV photodetectors.

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Section: Introductionsupporting

confidence: 77%

ZnO/CuCrO₂ Core–Shell Nanowire Heterostructures for Self‐Powered UV Photodetectors with Fast Response

Cossuet

Resende

Rapenne

et al. 2018

Adv Funct Materials

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“…Copper chromium oxides contrast with other delafossites, in terms of: (i) high density of state of 3d M cations (Cr 3+ ) near the valence band maximum, (ii) covalent mixing between chromium and oxygen ions and (iii) good dopability, [17][18][19][20][21][22] making CuCrO 2 a good p-type candidate for transparent electronic devices. Several methods were reported in the literature for the synthesis of CuCrO 2 : solid-state reaction (SS), 17,[20][21][22][23][24][25][26][27][28][29][30] sol-gel (SG), [31][32][33][34][35][36][37] pulsed laser deposition (PLD), [38][39][40][41][42] magnetron sputtering (MS) 16,[43][44][45][46] and chemical vapor deposition (CVD) including spray pyrolysis. [47][48][49][50] A summary of the electrical and optical properties versus the synthesis methods and the process temperature is given in are obtained with the films deposited by sol-gel, due to the low carrier concentration.…”

Section: Introductionmentioning

confidence: 99%

Transparent conductive CuCrO₂thin films deposited by pulsed injection metal organic chemical vapor deposition: up-scalable process technology for an improved transparency/conductivity trade-off

et al. 2016

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aMetal organic chemical vapor deposition is carefully optimized for the growth of pure CuCrO 2 delafossite coatings on glass substrates. The pulsed direct liquid delivery is demonstrated to be an efficient process technology for the controlled supply of the precursor solution in the evaporation chamber, which is shown to be one of the main process parameters to tailor the thin-film properties.We investigated the influence of the precursor concentration ratio Cu(thd) 2 (bis[2,2,6,6-tetramethyl-3,5-heptanedionato]copper(II)) and Cr(thd) 3 (tris[2,2,6,6-tetramethyl-3,5-heptanedionato]chromium(III)) on the crystal structure, morphology and electrical conductivity, at a reduced temperature of 370 1C. We observe for a low ratio, a pure delafossite phase with a constant Cu-poor/Cr-rich chemical composition, while at a high ratio a mixture of copper oxides and CuCrO 2 was found. The as-grown 140 nm-thick pure delafossite films exhibit an exceptional high electrical conductivity for a non-intentionally doped CuCrO 2 , S cm À1, and a near 50% transparency in the visible spectral range.

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“…Overall the recent optical measurements have found the direct optical bandgap to be in the range of 2.95-3.30 eV estimating CuCrO2 to be transparent to visible light. 20,21,22,23,24,25 It should also be mentioned that besides the TCO applications, CuCrO2 has attracted attention for a range of other applications, ranging from catalysis 26,27,28 and sensors 29,30 to thermoelectrics, 31,32,33 photocatalysis and removal of various hazardous gases 34,35 metal cations. 36 There are many methods available for the preparation of CuCrO2 thin films and coatings, such as reactive sputtering deposition, 37,38 pulsed laser deposition, 39,40,41,42 chemical solution deposition, 43,44,45,46 and molecular beam epitaxy.…”

Section: Introductionmentioning

confidence: 99%

Atomic layer deposition of transparent semiconducting oxide CuCrO₂ thin films

2015

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Atomic layer deposition (ALD) is a vital gas-phase technique for atomic-level thickness-controlled deposition of high-quality thin films on various substrate morphologies owing to its self-limiting gas-surface reaction mechanism. Here we report the ALD fabrication of thin films of the semiconducting CuCrO2 oxide that is a highly prospective candidate for transparent electronics applications. In our process, copper 2,2,6,6-tetramethyl-3,5-heptanedionate (Cu(thd)2) and chromium acetyl acetonate (Cr(acac)3) are used as the metal precursors and ozone as the oxygen source. Smooth and homogeneous thin films with an accurately controlled metal composition can be deposited in the temperature range of 240-270 o C; a post-deposition anneal at 700-950 o C i n a n A r atmosphere then results in well crystalline films with the delafossite structure. Electrical transport measurements confirm the p-type semiconducting behavior of the films. The direct bandgap is determined f r o m U V -v i s s p e c t r o p h o t o m e t r i c m e a s u r e m e n t s t o b e 3 . 0 9 e V . T h e observed transmittance is greater than 75% in the visible range.

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Photoelectrochemical Properties of CuCrO2: Characterization of Light Absorption and Photocatalytic H2 Production Performance

Cited by 34 publications

References 49 publications

ZnO/CuCrO₂ Core–Shell Nanowire Heterostructures for Self‐Powered UV Photodetectors with Fast Response

ZnO/CuCrO₂ Core–Shell Nanowire Heterostructures for Self‐Powered UV Photodetectors with Fast Response

Transparent conductive CuCrO₂thin films deposited by pulsed injection metal organic chemical vapor deposition: up-scalable process technology for an improved transparency/conductivity trade-off

Atomic layer deposition of transparent semiconducting oxide CuCrO₂ thin films

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Photoelectrochemical Properties of CuCrO2: Characterization of Light Absorption and Photocatalytic H2 Production Performance

Cited by 34 publications

References 49 publications

ZnO/CuCrO2 Core–Shell Nanowire Heterostructures for Self‐Powered UV Photodetectors with Fast Response

ZnO/CuCrO2 Core–Shell Nanowire Heterostructures for Self‐Powered UV Photodetectors with Fast Response

Transparent conductive CuCrO2thin films deposited by pulsed injection metal organic chemical vapor deposition: up-scalable process technology for an improved transparency/conductivity trade-off

Atomic layer deposition of transparent semiconducting oxide CuCrO2 thin films

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Product

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ZnO/CuCrO₂ Core–Shell Nanowire Heterostructures for Self‐Powered UV Photodetectors with Fast Response

ZnO/CuCrO₂ Core–Shell Nanowire Heterostructures for Self‐Powered UV Photodetectors with Fast Response

Transparent conductive CuCrO₂thin films deposited by pulsed injection metal organic chemical vapor deposition: up-scalable process technology for an improved transparency/conductivity trade-off

Atomic layer deposition of transparent semiconducting oxide CuCrO₂ thin films